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Field of View Formula:
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Field of View (FOV) is the extent of the observable world that is seen at any given moment through a camera lens or optical instrument. It's typically measured in degrees and determines how much of a scene will be captured.
The calculator uses the field of view formula:
Where:
Explanation: The formula calculates the angular field of view based on the physical dimensions of the camera sensor and the focal length of the lens.
Details: Calculating field of view is essential for photographers, cinematographers, and optical engineers to understand how much of a scene will be captured, plan shots, select appropriate lenses, and achieve desired compositional effects.
Tips: Enter the sensor size in millimeters (common sizes: full-frame 36mm, APS-C ~23.6mm, Micro Four Thirds 17.3mm) and the focal length of your lens in millimeters. Both values must be greater than zero.
Q1: Why is field of view important in photography?
A: FOV determines how much of a scene will be captured, affecting composition, perspective, and the relationship between foreground and background elements.
Q2: How does sensor size affect field of view?
A: With the same focal length, a larger sensor will capture a wider field of view, while a smaller sensor will capture a narrower field of view (crop factor).
Q3: What's the difference between horizontal, vertical, and diagonal FOV?
A: This calculator provides the diagonal FOV, which is the most common measurement. Horizontal and vertical FOV can be calculated using the aspect ratio of the sensor.
Q4: How does focal length affect field of view?
A: Shorter focal lengths provide wider fields of view (wide-angle), while longer focal lengths provide narrower fields of view (telephoto).
Q5: Can I use this calculator for different camera formats?
A: Yes, as long as you input the correct sensor size for your camera format, the calculator will work for any digital camera system.